Citation: Xingyan Liu, Kaili Wu, Yacen Tang, Ning Qi, Yumeng Zhang, Youzhou He, Min Fu, Yanhui Ao. Ti₃C₂ MXene-derived TiO₂@C attached on Bi₂WO₆ with oxygen vacancies to fabricate S-scheme heterojunction for photocatalytic antibiotics degradation and NO removal[J]. Chinese Chemical Letters, ;2025, 36(11): 110882. doi: 10.1016/j.cclet.2025.110882 shu

Ti₃C₂ MXene-derived TiO₂@C attached on Bi₂WO₆ with oxygen vacancies to fabricate S-scheme heterojunction for photocatalytic antibiotics degradation and NO removal

Xingyan Liu ^{a, 1} ,
Kaili Wu ^{a, 1} ,
Yacen Tang ^{a, 1} ,
Ning Qi ^{a, *,} ,
Yumeng Zhang ^a ,
Youzhou He ^{a, *,} ,
Min Fu ^a ,
Yanhui Ao ^{b, *,}

a.
Chongqing Key Laboratory of Catalysis and New Environmental Materials, College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China
b.
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China

2019047@ctbu.edu.cn

yzhectbu@163.com

andyao@hhu.edu.cn

Received Date: 2 August 2024
Revised Date: 20 December 2024
Accepted Date: 19 January 2025
Available Online: 20 January 2025

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The application of photocatalytic technology in treating various environmental pollution issues has been extensively studied. However, its further utilization has been hindered by the limited response to visible light and the serious recombination of charge carriers. In this study, the two-dimensional (2D) layered carbon-supported TiO₂ particles derived from Ti₃C₂ Mxene were tightly attached on Bi₂WO₆ containing oxygen-rich vacancies, fabricating an efficient S-scheme bifunctional heterojunction. This development aimed to improve the photocatalytic performance towards antibiotics degradation and NO removal. The photochemical characterizations confirmed that the presence of oxygen vacancies broaden the visible light responsiveness of Bi₂WO₆. Subsequently, the formation of S-scheme heterojunction between oxygen vacancy-containing Bi₂WO₆ and TiO₂ allowed for the maximum retention of the high oxidation and reduction capabilities of the monomer material. Simultaneously, layered carbon between Bi₂WO₆ and TiO₂ accelerated charge transfer and carrier separation. The optimized BWO/TiO₂@C exhibited superior performance, with an 84.03% degradation rate of tetracycline (TC) and a 44.2% removal rate of NO under visible light, representing 1.54 and 4.79 times the performance of the original Bi₂WO₆, respectively. Intermediate species generated during the photocatalytic oxidation processes of TC and NO were identified using liquid chromatograph mass spectrometry (LC-MS) and in-situ DRIFTS. By combining electron paramagnetic resonance (EPR) and density functional theory (DFT) calculations, in-depth mechanisms were elucidated. This study sheds new light on the applications of Bi₂WO₆ and MXene in photocatalysis, offering potential for the development of efficient dual-functional photocatalysts for addressing water and air pollution.
- Bi₂WO₆,
- TiO₂@C,
- Ti₃C₂ MXene,
- Antibiotics degradation,
- NO removal,
- Photocatalyst
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Ti3C2 MXene-derived TiO2@C attached on Bi2WO6 with oxygen vacancies to fabricate S-scheme heterojunction for photocatalytic antibiotics degradation and NO removal

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通讯作者: 陈斌, bchen63@163.com

Ti₃C₂ MXene-derived TiO₂@C attached on Bi₂WO₆ with oxygen vacancies to fabricate S-scheme heterojunction for photocatalytic antibiotics degradation and NO removal